Stencil-printing machine



(No Model.)

A. G. SHANNON. STENGIL PRINTING MACHINE.

UNITED STATES PATENT OFFICE.

ALBERT (lr. SHANNON, OF SANTA ROSA, GALl FORNIA.

STENCILPRINTING MACHINE.

SPECIFICATION forming part ef Letters Patent No. 257,521, dated May 9,18812.

Application filed November lS, 18H1. (No model.)

To all whom it may concern:

Be it known that I, ALBERT G. SHANNON, a citizen of the United States,residing at Santa Rosa, in the county of Sonoma and State ofCalifornia,have invented certain new and useful 4Improvements in StencilPrinting Machines; and I do declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertaius to make and use the same,reference being had to the accompanying drawings, and to the letters andligures of reference marked thereon, which form a part of thisspecification.

Myinveution relates to a stencil-printing machine in which two cylindersare so arranged in a frame as to work against each other by means ofcogs, and are fed byink from theinside. Stencil or perforated paper fromwhich it is desired to take impressions is placed around one or bothcylinders, so that paper passing between said cylinders can be printedon one or both sides. The cylinders are perforated and partially filledwith ink, but s o arranged (by smaller closely-iittin g insidecylinders) that the ink can be turned oft' from either at pleasure.Therefore when one side only of a paper is to be printed the stencilfrom which the impressions are to be taken can be placed around one ofthe cylinders. The ink in the opposite cylinder should be shutoff and annnperforated sheet placed around the same and held by means of theclamps thereon. A clean sheet of paper then passing between thecylinders will receive vthe impression from the cylinder carrying thestencil or perforated paper. 1f, however, it is desired to print bothsides ot' a sheet at the same time with different subject-matter,perforated paper can be placed` around each of the cylinders, the inkturned on, and the paper moving between said cylinders necessarilyreceives the exact impression contained on the two stencils. A knife isplaced on one cylinder, so as to cut the paper at each impression orrevolution of the cylinders.

Figure lis a perspective view of cylinder A, (containing inclosedcylinders A and 60,) having the encircling-cloth partially removed, soas to show the parallel lines of holes through which the ink passes fromthe inner cylinders that saturates the cloth. Fig. 2 shows inperspective the cylinders A and a, A being partially broken away, thatit within the cylinder A. Fig. 3 is a perspective of cylinder c. Fig. u

x spective view of my improved press. Fig. 8

is a bifureated handle, to be used, when desired, on cylinder A or A.

rlhe cylinders A and A2 have rows of holes I), which may be ot' anydesired size or shape, running parallel with eachother from one endofthe cylinders t0 the other, leaving as much space between the rowsofholes as is occupied by the diameter ot' a hole.

A is a cylinderhavingscvcral parallel lilies of holes, B, and is largeenough to iit tight-ly inside of the cylinder A or A2, in which it isplaced. The large cylinders A and A2 are alike in function andconstruction, and therefore each contains the ink-regulating cylindersA.' and a.

a is a cylinder, liquid-tight, either solid or hollow, and fits looselyin A or A2, and is designed to take up aportion ofthe spacein saidcylinders. (l is a rod, which runs through and iits tightly `i ncylinders a and A', so as to canse them to turn with it, and also passesthrough the extensions E E.

E is an extension of portion of each head of the cylinders A A2, aroundwhich is fastened the cog-wheel F, and leaving space between thecog-wheels F and the cylinders A A2 for an axle, and leaving space onthe outside of the cog-wheel for a crank or wheel or other power l toturn the machine. G isa handle at-the end ofthe rod d, which turns therod d and cylinder Af, and is regulated by the scale C.

H. it are holes which are closed by a screwstopper, the head of eachiittin g flush with the surfaces of the cylinders.

I is a groove in the cylinder A, running from one end to the other.

K represents sprin gs, to be used to fasten the stencilpaper 'thatencircles cylinders A A2.

The ends of said paper meet and are inserted into the groove I.

L is the covering, ot'cloth or other substance, tting around thecylinders A A2. The cloth L is held firmly around and against the endsof the cylinders by screws J and springs K. The springs K are fastenedat their inner ends in the groove I. They are dat and extend outward,and havearight-angled projection,which io gives the spring a T shape.Said spring tits closely against the ends of the stencil-paper, thepaper being inserted under the springs, by which means it is secured tothe cylinder.

M is the frame in which the machine works.

N represents grooves in which the ends oi" the cylinders A and A2 workwhen placed in the frame M.

O is a set-screw that fits against the axle to regulate the pressure ot'the cylinders one zo against the other.

I? represents a roller fitting in frame Q, around which a roll of paperis placed.

Q is a frame fastened to the i'rame M.

1^ It is a knife with sharp indentations on the edge, which may befastened in the groove I.

If the two cylinders A A2 be placed in the frame M, with axles in thegrooves N, the cogs F tting in each other, and a stencil-paper made bythe electric pen or the needle typewriter patented by me November I,i881, and numbered 248,890, be placed around the cloth on cylinders Aand A2, and fastened by means ot' the springs K, and the handle G beturned ou the graduated scale C so hole h be directly under the hole II,the holes b will then bc stopped by the solid portions of the interiorsurface ofthe cylinders A and A?, and the holes B will be stopped 'bythe solid portions of the cylinders A'.

4o to the proper consistency by oil, be poured in holes II h, when inline, and the stoppers replaced, it will hold the same without leaking;and when the handle G is turned on the grad uated scale G until theholes i) come under the 5 holes B the ink escaping through said holes isabsorbed and equally distributed on the cloth covering the surface. Theend of paper around the roller Pis then placed between the cylinders AA2, which are revolved by means o ofthe power attached to the extensionE, and the paper-stencil placed around each cylinder A A2 will be copiedon the sides ot' the paper passing between said cylinders. It the knit'eR be pla-ced in the groove I in the cylinder A Il" printers7 ink,softened so that the pointed edges will work in the groove I of thecylinder A2, the printed paper passing between the cylinders A A2 willbe cut ott' at cach revolution of said cylinders.

The handle S, Fig. 8, may, it' desired, be placed on the extensions E Eof one ot' the 6o cylinders after the cog-wheels are removed, andthesaid cylinder, by means of this handle, may be rolled on the paper to beprinted, making a copy ot` the stencil around it at each revolution.

It is obvious that the two standards forining the frame Q may be set atany desired point on the side bars otl the frame M, and that roller Pcan also be made a length to conform therewith. By this means a roll ot'paper of' 7o any width can be used.

It must also be apparent that the uprights Q Q can be tlxed to the endsol the frame M and the roller l) constructed a conforming length.

Having thus described my invention, I claim as new and desire to secureby Letters Patentl. In a stencil-prii'lting machine, the cylin ders Aand A2, having ink-receiving holes H, which are closed byscrew-Stoppers, said cyl- 8o inders containing cylinders A', which arealso provided with in k-receivin g holes h,so arran ged that the holesI-I and h can be placed in a direct line by means of the rod d, havingthe handle G, which is designed to be turned, when desired, on the scaleC, the latter indicating the relative position ot' the holes H and h,the perforationsB b in the cylinders being so arranged as to be closedwhen H and It are opened, all substantially as described, and for thepur- 9o poses set forth.

2. The cylinders A`Z A', having perlorations B b, the formercloth-covered and provided with groove I, springs K, and knife It, incombination with cylinders A A', similarlyY pert'o- 95 rated, covered,grooved, and provided With springs, the groove in cylinder A beingadapted for the working ot' the knife I{,and said cylinders A A2 gearedtogether and adjustably mounted on frame lll, in the manner and for roothe purposes set forth.

In testimony whereof I affix my signature in presence of two witnesses.

ALBERT G. SHANNON.

Witnesses: .i ROBERT A. THoMPsoN, REGINALD W. Trroiurson.

